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Publish a chart of CSV data queried in real-time using SQL
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8" /> | |
| <title>Liberal Democrat polls and quarterly polling averages</title> | |
| <script src="//vega.github.io/vega-editor/vendor/d3.min.js"></script> | |
| <script src="//vega.github.io/vega/vega.min.js"></script> | |
| </head> | |
| <body> | |
| <div id="vis"></div> | |
| <script type="text/javascript"> | |
| function parse(spec) { | |
| vg.parse.spec(spec, | |
| function (error, chart) { | |
| chart({el:"#vis"}).update(); | |
| }); | |
| } | |
| parse("spec.json"); | |
| </script> | |
| </body> | |
| </html> |
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| { | |
| "width": 800, | |
| "height": 265, | |
| "data": [ | |
| { | |
| "name": "quarterly_averages", | |
| "url": "http://data.flother.is/ukpolls?q=SELECT+TO_CHAR(date%2BINTERVAL+%2745+days%27,%27YYYY-MM-DD%27)+AS+date,+AVG(pollster_avg_share)+AS+avg_share+FROM+(SELECT+DATE_TRUNC(%27quarter%27,date)+AS+date,pollster,AVG(share)+AS+pollster_avg_share+FROM+ukpolls+WHERE+date%3E=CURRENT_DATE-INTERVAL+%275+years%27+AND+party=%27Liberal+Democrats%27+GROUP+BY+date,pollster)+AS+polls+GROUP+BY+date+ORDER+BY+date", | |
| "format": { | |
| "type": "csv", | |
| "parse": { | |
| "date": "date", | |
| "avg_share": "number" | |
| } | |
| } | |
| }, | |
| { | |
| "name": "polls", | |
| "url": "http://data.flother.is/ukpolls?q=SELECT+date,share+FROM+ukpolls+WHERE+date%3E=CURRENT_DATE-INTERVAL+%275+years%27+AND+party=%27Liberal+Democrats%27+ORDER+BY+date", | |
| "format": { | |
| "type": "csv", | |
| "parse": { | |
| "date": "date", | |
| "share": "number" | |
| } | |
| } | |
| } | |
| ], | |
| "scales": [ | |
| { | |
| "name": "xscale", | |
| "type": "time", | |
| "range": "width", | |
| "domain": { | |
| "data": "quarterly_averages", | |
| "field": "date" | |
| } | |
| }, | |
| { | |
| "name": "yscale", | |
| "range": "height", | |
| "domain": { | |
| "data": "polls", | |
| "field": "share" | |
| } | |
| } | |
| ], | |
| "axes": [ | |
| { | |
| "type": "x", | |
| "scale": "xscale" | |
| }, | |
| { | |
| "type": "y", | |
| "scale": "yscale", | |
| "title": "%" | |
| } | |
| ], | |
| "marks": [ | |
| { | |
| "type": "symbol", | |
| "from": { | |
| "data": "polls" | |
| }, | |
| "properties": { | |
| "enter": { | |
| "x": { | |
| "field": "date", | |
| "scale": "xscale" | |
| }, | |
| "y": { | |
| "field": "share", | |
| "scale": "yscale" | |
| }, | |
| "size": {"value": 8}, | |
| "fill": {"value": "#fdbb30"}, | |
| "opacity": {"value": "0.2"}, | |
| "strokeOpacity": {"value": "1"} | |
| } | |
| } | |
| }, | |
| { | |
| "type": "line", | |
| "from": { | |
| "data": "quarterly_averages" | |
| }, | |
| "properties": { | |
| "enter": { | |
| "x": { | |
| "field": "date", | |
| "scale": "xscale" | |
| }, | |
| "y": { | |
| "field": "avg_share", | |
| "scale": "yscale" | |
| }, | |
| "strokeWidth": {"value": 3}, | |
| "stroke": {"value": "#fdbb30"} | |
| } | |
| } | |
| } | |
| ] | |
| } |
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